我们有一个物种的不同。
Curiously, researchers have also seen melanin in the testes of a variety of species in all vertebrate groups.
奇怪的是,研究者们发现了这种色素存在于各种各样的脊椎动物中。
A variety of species of whales have been rediscovered in the vicinity of New York. Is it because they love musicals? David Biello investigates.
多种鲸类在纽约附近被再次发现。这是因为它们喜欢听音乐剧吗?戴维·比埃罗进行了探索。
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